1. Servant Of (The) Bones: a once-prominent PimpsLord cartel founded by Candy, et. al., based in Tokyo, Japan (not the real Tokyo, but the Tokyo of the PimpsLord universe); consisted of many cartels, of which many members therewith were Free Pimps (non-subscribers). They held an ongoing allegiance (or at least a no-hit) with the Hatters cartels (Mad Hatters, Dark Hatters), and had strong opposition from the Tiger Team and F.L.C./Ducks (Fun Lovin' Criminals) cartels. The Servant of the Bones have since disbanded, along with their rival cartels - the only major cartel of that era still presently intact and relevant is the Hatters cartels, though rumored talks of an S.O.B. revival have been recently confirmed.

2. Perhaps some similarly-named cult or fan club of the Bone-Thugs-N-Harmony. Not saying I've ever heard of such a cult/fan club, but consider the possibility...

F.L.C. Cartel Leader: Henchmen, we gotta extort more; we don't have enough cartel thugs for protection - hit the grids and get some money.
F.L.C. Cartel Henchman A: But boss, the S.O.B.s just gridded me a while ago for trying to extort in Tokyo!
F.L.C. Cartel Henchman B: Yeah, me too!
F.L.C. Cartel Henchman C: That's 'cause you guys are losers! Why would you even go to Tokyo to extort when you can extort here in New York? That s@#t would've never happened to you if you would've stayed here in New York! (Checks his status, only to find that he's been zeroed whilst in New York) Wait a minute - never mind...
F.L.C. Cartel Henchman D: Motherf#$k those S.O.B.s, man!
F.L.C. Cartel Leader: Whoops, looks like I just got zeroed too; seems we're going to have to ask Tiger Team for help, AGAIN...

Tiger Team Cartel Leader: Bro, I need some protection from these S.O.B.s, man - they're destroying us this round.
F.L.C. Cartel Leader: Funny, I was just about to come and ask you the same thing...
Tiger Team Cartel Leader & F.L.C. Cartel Leader (in unison): MOTHERF#%K THE S.O.B.S!!!

well, it all started at snake road. we were playing a game and this cute boy tried to steal my flag, and i said, "son of a bitch!" cuz i'm just vulgar like that, and the name has stuck ever since as a code name.